Type-writing machine.



U. G. FULLER. TYPE WRITING MACHINE. APPLICATION FILED MAY 1a, 1908.

Patented May 11, 1909.

Wizvz eases.

Atzo rney 11"- Mm 261N11 S illia ll ltfl PATENT ULYSSES G. FULLER, OIllAltlFORl'), (ONNIICllCU'lX ASSIGNOR TO UNDERWOOD TYPE WRITER COMPANY,OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPEJVRETING IVIACHINE.

Application filed May 18, 1908.

To all whom '2' 1 our conccrnf:

Be it known that l, Urrssns G. FULLnn, a citizen of the United States,residing in Hartford, in the county ot Hartford and State ofConnecticut, have invented certain new and useful lmproven'ients in Typeriting' Machines, of which the following is a specification.

This invention relates to paper feeding devices of typewritiug maphines,and is in the nature 01 an improvement upon the l'nechauism disclosed inapplication No. 398,599, in which the platen swung backwardly andforwardly hy a crank. the first movementto tiring the platen to'iosition to receive a hill. and the second movement to bring the hillto the printing point; said application relating particularly to meansfor securing blank spaces between the car bon entries of successivehills on a corbon sheet which is retained in the machine. ln saidapplication, a crank is shown mounted on the platen t'ranic, hut isnormally out of engagement .with th'c platenfa single swinging movementof the crank serving to rotate the platen. The crank is mounted looselyupon the platen axle, and a. pawl or dogis pivoted upon the crank inposition to engage a notched or toothed wheel, the latter heing fixed tothe platen: a spring normally holding the pawl out of engagement withthe notc-hm'l wheel. A single movement of the crank throws the pawl intoengagement. with the notched wheel, such engagement heing mechanicallymaintained until the crank is swunghack to normal position. whereuponthe spring; throws the pawl or dog" out of engagement with the toothedwheel. and also serves to said application, the crank-(merating dog iscaused to skip one or more notches or teeth ol' the wheel during theinitial portion of the iuitialstroke ott'he crank (or other lingerpiece) and then to engage said wheel to turn it around. so that theplaten turned hackwardly din-in; the remainder of said stroke of thecrank. "the engagement ot' the dog with said wheel is also maintainedduring the entire return movement: of the crank to normal position, sothat the forward rotation of the platen ell'ected by said wheel isgreater than the backward rotation thereof. Thus the platen is caused toturn hackwardly a relatively short dis- Specificat-ion of LettersPatent.

Patented May 11, 1909.

Serial No. 433,532.

the machine during the writing of successive hills, as understood inthis art. That, is to say, the record sheet is turned back with theplaten through a certain arc to the point where -a new hill isintroduced, and is then turned forward with the platen through a{ltttltG' arc, so that the record of the new hill separated by a spaceon the record sheet from the record of the immediately preceding hill.

The ohject ot the present invention is to simplify and improve theconstruction and operation of the latch or trip mechanism, which causesthe dog or pawl to skip the teeth of the notched wheel to eti'ect the.spacing between the succtssi\'e hills on the carbon sheet. I pivot uponthe crank a pawl to engage the notched wheel, and l fix upon the pawlhetwcen i s tooth and pivot. a forward pin to fall into the recess inthe rim of the disk. that is, the rim which is pertoraicd to torn: arack for the crank stop.

'lhe pawl is pivoted hctwecn its ends uponspringupon the disk engages anotch providcd between the pivot and tooth ot' the pawl. and tends tothrow the tooth ot the pawl away t'rom the wheel, hut such vibration rtthe pawl is prevented by a second 'pin, the latter riding upon the outerface of hold the crank in its normal position. In

the trip or latch. As the crank continues to turn. the second pinescapes from the trip and permits the first or forward pin to spring:into the recess in the fixed rim. The forward pin is of considerablelength to enpage the cam wall of said recess, while the rear or secondpin is short so as to clear entirel the rim or ract; and the tripprojects from the face ot said rim in position to be engaged by saidsecond pin. Said'recess is in the term of an arc. the forward wallthereof serving to cam the pawl into engagement with the wheel, whilethe rear wall thereof serves as a stop for the return movement of thecrank.

ln the accompanying drawings, Figures 1,

and 3 are diagrams, the first showing the l by a link parts in normalposition, the second showing the pawl engaged to the notched platenwheel, and the third showing the wheel as 5 having been turned by thepawl. Fig. l is a plan of a portion of the platen frame and platen of anUnderwood t'ront strike writing machine showing my improvements appliedthereto. Fig. 5 is a sectional. View to illustratethe construction ofthe trip, etc. Fig.

6 a face View of the disk upon which the trip is mounted and the springto control the pawl. Fin". 7 illustrates the manner in which the pawlrides over the trip during the return stroke of the crank. Fig. 8 is aView similar to Fig. :2, butshowing the connection of the disk to theplaten frame etc, the parts being shown in normal positions. Fig. 9 a.View similar to Fig. 8,

but showing the parts in the Fig. El position.

Fig. 10 is a View similar to Fig. 9, but showing the forward stroke ofthe crank as urres'ted by the stop. Fig. 11 a perspective View oi. apanil-controlling spring. .l ig. i2 is a sectional plan oi theplaten-controlling dcusual cylindrical platen. l of an Un :ie woe-dtypewriting' machine is fixed upon an axle f2 iournaled in the ends 3 oia platen frame, the end of the axle projecting through the platen lranie end and. having lin -wheel ti thereon llj n'ieans of which thenmay he rotatet l :lorwardly or hacklit. The platen jo an til imited everi ied. with the usual linc'spaeing h toothed line-space wheel gdelent tl'iereior are seen at line-space wheel is advanced ttently l y apawl 9 and lover 9. he end of the platen axle is secured a Y hub ll of awheel l t having teeth or notches l5 agreeing in min'ilier with theteeth on the linespace wheel 7. 'lhe wheel .14 is rotatahle by means oia pawl 16 pivoted between its ends at l? upon a crank 18, the tooth ll)of the pawl normally disengaged from the wheel, as at i i s. '1 and 5%,to pern'iit independent rotation of said wheel and the platen l. Thecrank is mounted upon the so platen axle by means of a. hub 20.

l i hen the crank is swung forwardly trom the Fig. .l to the Fig. 2position, a lone pin 2; normally occupying an arched recess 22 inv afixed rim 23, engages the camehaped .l orward. wall 22" of said recess.and forces the pawl tooth to engage a notch 16 ol the wheel, Figs.andll. its the crank (on- -tinues to swing 't'orv-i'ardly, the pin it.rides along the inner wall or edge of the rim 23, whereby the pawl islocked to the wheel. 'lhe forward motion oi the crank is arrested by astop 2 which carries a pin 25, whereby the stop may he set to any of aseries ol holes 20 formed in the rim 23. The latter is formed upon a.disk 27 which is connected l l l l l l l l 28 to an ear 29 formed uponthe platen frame end 3. Upon the return movement of the crank, a finger30 project inn" upfrom a' spring 31, the end of the latter secured uponthe disk by a screw 32, engages a recess 33 formed in the pawl betweenits pivot and its tooth, so as to tend to turn said pawl away from thewheel. The release of the pawl from the wheel is temporarily preventedby means of a trip 34, which is ei'igaged by a short pin 35 formed uponthe opposite end of the pawl from the tooth if). The pin 35 is shortenough to clear the rim 23, and the trip 2% projects from the face ofthe rim to engage the pin :35. The latter rides upon the outer face ofthe trip, as atl ig. 7, and thereby holds the pawl ten'iporarily inengagement with the tooth, so as to give an extra forward rotation tothe platen during the final portion of the return movement of the crank.As soon as the pin 35 escapes from the trip 34,

the spring 3i snaps the pawl away from the wheel, and the forward pin orprojection 21 thus up into the recess 22, Figs. 1 and 8, this being itsnormal position. The crank is finally arrested in its return movement byengragcn'ient of the pin 2t with the rear wall of the recess 92, Fig. 1.

l t will he understood that at the initial portion of the forward strokeof the crank, therear or second pin 35 turns the trip one sideagainstthe tension of a spring 36, Fi 2. Said spring normally pressessaid strip against a stop 37. At Fig. 5, it will be seen that the springas is coiled about the pivot 57 of the trip, the latter preferablyhaving a shoulder 38 flush with the face of the rim 2 and the springbeing confined between said shoulder and the bottom of a recess orbearing 39 t'ormed in the rim to receive said shoulder. The trip ispreferably in the torn: (ii a linger integral with the shoulder andextending along the rim 23. It will thus l)(. seen that the forwardstroke of the platen is rendered longer than the backward strokethereof, and hence that a blank space is lel't between the entries onthe car-l llUll sheet, which remains in the machine during thewithdrawal of the old bill. and the in ertion ol the new one. Theoperator simply grasps the handle AlOprovided upon the vrank lb andpulls the crank forward as far as it will go, and lhenafter introducinga new l ill pushes the crank hack to its starting point, whereupon thefirst line of writing may be begun upon the new hill without attentionfrom the operator to the matter ol properl separating the records on therecord short.

it will be seen that llie. construction is much simplilicd and improved,and that it will prove reliable in use. it will he seen that the recessis notmlosed at any point, and that the arrest of the crank to may beconvenientb etl ected by the engagement of the pin 21 with the rear\''all while the trip ill extends hackwardly from the re es with itstree end adjacent thereto, said trip heing in the form of a tongueformed upon the shoulder 38 which is received in the pivot bearing inthe rim. The forward pin or projection 21 has but two or three simplefunctions to perform, while the trip-contril of the pawl 16 is etl'ectedhy a separate pin 7 Having thus described my invention, l claim: 7

1. in a typewriting machine having a platen frame, a revoluhlo platen.and a notched wheel to rotate therewith. the conn hination with a crankmounted to turn ahout the axis of the notched wheel, and a fixed memherupon the platen frame provided with an annular rim and having a ra 'kfor an adjustable stop to arrest the cank and also having a recess, of apawl pivoted hetween its ends upon the c ad: and provided at the toothedend with a pin to engage the inner side oi. the rim to hold the pawl inengagement with the wheel, said pawl provided upon its outer end with asecond pin, a pivoted trip upon which the second pin rides during theretraction of the c 'ank. and a spring o turn the pawl away from thewheel and throw the first pin into the rcccss in the rim when the secondpin cscapea from said trip.

2. la a typewriting machine having a platci tramc. a rcvoluhle platen.and a notched wheel to rotate therewith, the comhination with a crankmounted to turn about the axis of the non-lied wheel, and a tired menu/eupon the platen trainc provided with an anpular rim and having a rackfor an adinatahle stop to arrest the crank and also having a IGHHS. oi apawl pivoted hotwc-r-n its ends upon the crank and provided at itstoothed end with a pin to engage the inner side oi the rim to hold thepawl in cugagcincnt with the wheel. said pawl provided upon its outerend with a second pin, apivotcd trip upon which the second pin ridesduring the rctrm-tiou ot the crank. and a apring to turn the pawl awayfrom the wheel and throw the tirst pin into the rcccss in the in whenthe second pin es apes l'rozn said trip: said recess having a camedge toengage the first. pin to throw the pawl tooth into a notch in the wheel.and said trip yielding to the action of the wecond pin during thecanuning ot' the pawl.

.3. in a t. vpcwritiug machine having a platen t'ramc. a revoluhlcplaten. and a notched wheel to rotate therewith. the coup hinatiou witha crank mounted to turn ahoutthe axis oi the notched wheel. and a lixedmemher upon the platen frame, provided with an annular rim and having arack t'or an adjustahle atop to arrest the crank and or". the recess, I

also having a recess, of a pawl pivoted between its ends upon the crankand provided at itatoothed end with a pin to engage the inner side ofthe rim to hold the pawl in engagement with the wheel, said pawlprovided upon its outer end with a second pin, a pivoted trip upon whichthe second pin rides during the retraction of the crank, and a spring toturn the pawl away from the wheel and throw the first pin into therecess in the rim when the second pin escapes from said trip; saidspring mounted upon said fixed member in the path of said pawl, to heengaged thereby during the return stroke of the crank, at a pointhctwecn the pivot and tooth ot the. pawl.

4. in a typewriting machine having a platen tramc, a rcvoluhle platen,and a notched wheel to rotate therewith, the cowhination with a crankmounted to turn about. the axis of the notched wheel, and a fixed memhcrupon the platen frame provided with an annular rim and having a rack foran adjustable stop to arrest the crank and also having a recess. ot apawl pivoted hetwccn its ends upon the orank and provided at ita toothedend with a pin to engage the inner side of the rim to hold the pawl inengagement with the wheel, said pawl provided upon its outer end with aseeond'pin, apivoted trip upon which the second pin rides during theretraction of the crank, and a spring to turn the pawl. away from thevheel and throw the first pin into the recess in the rim when the secondpin escapee from said trip; naid spring mounted upon said lined meinherin the path of said pawl, to he engaged thereby during the return strokeoi tne crank, at a point hetween the pivot and tooth ot the pawl. andthe pawl having a recess to receive said spring.

5. in a tvpewriting machine having a platen tramc. a revoluhle platen,and a notched wheel to rotate therewith. the comhination with a crankmounted to turn about th axis ot the notched wheel. and a fixed mcmherupon the platen frame provided with an annular rim and having a ra k:lor an adjustable stop to arrest the crank and al o having a recess, ota ])2' .-.-.'i pivoted he tween its cudupon the crank and provided atits toothed end with a pin to engage the inner side of the rim to holdthe pawl in engagcinei'it with the wheel. said pawl provided upon itsouter end with a second pin. a pivoted trip upon which the second pinrides during the retraction ot' the crank. and a spring to turn the pawlaway from the wheel and throw the first pin into the recess in the rimwhen the second pin escapes from said trip: said recess having acam-edge to engage the first pin to throw the pawl tooth into a uotch'inthe wheel, and said trip yielding to the action of tlnxsecond pin duringthe cainming of the pawl; the, first pin hav I the axis of the notchedwheel, and a pawl acting with the ratchet, means to LllSt'l1- '01" saidpawl to engage the latter and throw ing sufiicient length to enter therecess in the rim, and the second pin sulliciently short to clear therim saidtrip projecting above the rim to el'i' age the second pin.

(3. In a typewriting machine having a platen frame, a revolublc platen,and a notched wheel to rotate therewith, the combination with a crankmounted to turn about pivoted upon said crank, of means to enable thecrank to throw the pawl. into engagement with said wheel and hold itthere during the forward and backward movements of l the crank, a springhaving a support upon the platen frame and arranged in the path it awayfrom the wheel, said pawl providljad hetweenits pivot and tooth with arecess for said spring, and a trip to prevent the spring temporarilyfrom releasing the pawl at the return stroke of the craiik.

7. In a typewriting machine, the combine-- tion with a platen, of aratchet in COHEN. on therewitlnh back-and-iorth mov ng pawl coactingwith the ratchet, means to disen the pawl from the ratchet at apredetermined point in the movement of the pawl, a relatively fixedsupport, a trip pivoted there on, means for limiting the motion of thetrip in one direction, a projection on the pawl adapted to ride past oneside of the detent as the pawl is moving inone direction,-temporarily torestrain the action of said means for disengaging the pa :1, and to movepest the opposite side oi. the pawl wlthe ratchet is moving in the othertlli'i. ion, to 1 permit the' act-ion.ot said. means for disengaging thepawl, ano a can: on the support to be engaged by a pin on the. pawl.when the pawl is moving in the second named direction, to return thepawl to engagement with the ratchet.

8. In a typewritiug machine, the comhi a tion with a platen, of a.ratchet in. connection therewith, a hack-and-l'orth moving pawl. c

. the pawl from the ratchet at a pi determined point in the motion otthe pawl, a rel- 5 atively fixed support, a trip pivoted there 21, aprojection on the pawl, the projection movlug past one side of the tripas the pawl is moving in one direction, temporarily to re strain theaction of said means {or disc gaging the pawl, and past the oppositeside of the trip when the pawl is moving in the opposite direction topermit the action of said means for disengaging the pawl, a forward pinon the pawl, and a cam on the support, the forward pin engaging the camto return the pawl to engagen'ient with the ratchet when the pawl ismoving in the second direction after the action ot said means ofdisengaging the pawl.

ing inclined to art upon said pin to force the pawl-tooth intoengagement with the wheel, such engagement being maintained by thecoaction of said pin with the inner wall or edge of said rim, :1- springtending to release said pawl :t'rom the notched wheel, a trip pivoted onsaid fixed member and extending hackwardly from said recess, and havingits free end adjacent to the recess, and a pin upon said pawl to rideupon said trip to pro longthe engagement of the pawl with the wheel duriug the return stroke of the crank.

it). in a typewriting-machine having a platen frame, a revoluble platen,and a notched wheel torotate therewith, the combination with a'crankmounted to turn about the axis of the notched wheel, a awl pivoted uponsaid crank and norma ly out of engagement with the Wheel, and a fixedmember upon the platen frame and having a rim provided with a recess, ofa pin proin said pawl into said recess to per-ate with the rear wall ofthe recess in form a stop for the crank, the forward wall the recessbeing inclined to act upon pin to force the pawl-tooth into engageincntwith the wheehsuch engagement being maintained by the coaction of saidpin with the inner wall or edge of said rim, 3. spring tending torelease said pawl from the notched wheel, a trip pivoted on said fixedmember and extending baekwardly from saidv and having its free endadjacent to the Aces, and a pin il'pon said pawl to ride upon said tripto prolong the engagemerit of the pawl with the wheel during the returnstroke of the crank; said trip over lying the l: ce oi? the rim, andsaid trip-pin being shortenongh to clear the rim.

ll. in a tvpewritim; machine having a platen frame, a revoluble platen,and a notched wheel to rotate therewith, the comhination with a crankmounted to turn about the axis ot the notched wheel, a pawl pivoted uponsaid crank and normally out of engagement with the Wheel, and a fixedmember upon the platen f'ame and having a rim provided with a recess, ofa pin projecting 'l'i'oni said pawl into said recess to coliperate withthe rear wall of the recess to form a stop for the crank, the forwardwail of the recess being inclined to act upon said pin to "force thepawl'tooth into engage- 9. In a typewriting machine having a ment withthe wheel, such engagement heplaten frame, a revolnhle platen, and a ingmaintained by the coaction or said pin ing the return stroke of thecrank; said trip overlying the face of the rim, and said trippin beingshort enough to clear the rim;

said trip being in the form of a tongue formed upon a shoulder which isreceived in a recess or pivot-bearing in the rim, and said.pawl-releasing spring being mounted upon said fixed member, and having"a part to engage the trip between its pivot and its tooth. 0

12. In a typewritinp machine having a platen frame, a re'voluble platenand a, notched wheel to rotate therewith, the combination with a crankmounted to turn about the axis of the notched wheel and a member fixedupon the platen frame and proyided with an annular rim, said rimhaving-a recess, of a pawl pivoted upon the crank and having a pintoenter said recess to coopcrate with the'latter to cam the pawl. intoengagement with the wheel, a trip and a l l l l 1 ll 1 l l l separatepin or projection up said pawl to engage said trip to cooperate with thelatter to prolong the wheel-engaging movement of the pawl at the finalportion of the return stroke of the crank.

13. In a typewritingr machine having a platen frame, a revoluble platenand a notched wheel to rotate therewith, the combination with a crankmounted to turn about the axis of the notched wheel and a member fixedupon the platen frame and provided with an annular rim, said rim havingare cess, of a pawl pivoted upon the crank and ha'virn a pin to entersaid recess to cooperate with the latter to cam the pawl into engagementwith the wheel, a trip and a separate pin or projection upon said pawlto engage said trip to cooperate with thelatter to prolong the wlieeleng'agring moveiucnt. out the pawl at-the final portion of the returnstroke of the crank; said trip being located on said rim at a differentpoint from said recess, and the first pin cooperating with the rear wallof the recess to arrest the crank in its return movement.

ULYSSES G. FULLER. Witnesses 1 WJM. EYORKMAN,

Mou'roN C. TALCOTT.

